Calculating machine



T. CANEVARI Nov. 15, 1966 CALCULATING MACHINE 4 Sheets-Sheet l Original Filed July 3, 1961 Inl-M- HIll-.I

Nov. 15, 1955 T- C^NEV^R 3,255,511

CALGULATING MACHINEy Original Filed July 5, 1961 4 Sheets-Sheet 2 0'/ lllllllllllllllllllllllllllllllllilliiil T. CANEVARl Nov. 15, 1966v CALCULATING MACHINE Original Filed July 5, 1961 4 Sheets-Sheet 5 WSQ N0V- 15, 1966 T. cANEvARl CALYULATING MACHINE 4 Sheets-Sheet 4 Original Filed July 5, 1961 E om ,GOM

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NKNN n QNN N @NN NR di Q NMNN #du United States Patent O 3,285,511 CALCULATING MACHINE Teresio Canevari, deceased, late of Torino, Italy, by Anita Gianotti, sole heiress and legal representative, Turin, Italy, assignor, by mesne assignments, to Friden, Inc., San Leandro, Calif., a corporation of Delaware Original application .July 3, 1961, Ser. No. 123,085, now

Patent No. 3,181,786, dated May 4, 1965. Divided and this application Jan. 2, 1964, Ser. No. 343,175 2 Claims. (Cl. 23S-60.25)

The present application is a division of copending application S.N. 123,085, filed July 3, 1961, and now Patent No. 3,181,786, issued May 4, 1965, which application was xa continuing application with respect to United States application Serial No. 753,316, tiled August 5, 1958, now abandoned, which was a continuation-impart of United States .applications Serial Nos. 701,484, 701,485 and 701,659, led December 9, 1957, now abandoned, which latter three applications were tiled subject to a claim for priority under Italian applications Nos. 69, 70 and 71, iiled January 5, 1957, since issued respectively as Patent 565,040, issued July 8, 1957, Patent 565,041, issued July 8, 1957, and Patent 564,394, issued June 14, 1957.

This invention relates to printing calculating machines, and particularly to a print blocking mechanism for suppressing printing d-uring multi-cycle machine operations, such `as automatic -multiplication and division.

It is an object of the present invention to provide .a printing calculating machine which is capable of performing multiplication and division automatically; which is effective to print the multiplier, the multiplicand and the product, but otherwise supresses printing during the multiplying operation; which has division programming mechanism effective to repeatedly subtract the divisor from the dividend, and accumulate the quotient in the quotient register; and which is operative to print the dividend,'

the devisor and the quotient, or dividend total, and to suppress printing durin'g the division aligning and division operations.

Other objects and ladvantages will become -apparent from a consideration of the following description and the appended claims in conjunction with the accompanying drawings wherein:

FIG. 1 is a p-lan view of the keyboard of the machine and the decimal point selection mechanism;

FIG. 2 is av longitudinal, right-side, sectional view showing the selector, actuatorsfprinting mechanism, and the accumulator of the machine;

FIG. 3 is a left-side, elevational section showing the mechanism for suppressing printing during multi-cycle operations and part of the multiplication and keyboard clearing mechanism -associated therewith; and

FIG. 4 is a left-side elevational section of part of the division control mechanism.

A more complete description of the printing calculating machine in which the present invention is embodied appears in the abo-ve-mentioned U.S. Patent No. 3,181,- 786.

General construction and operation The calculator of the present invention includes a base plate supporting a plurality of upright -frame members on which the several mechanisms of the present invention are mounted, an electric motor operable through suitable gearing for driving a main clutch, the construction of which is well-known in the art, which clutch drives a main drive shaft 135. The main drive shaft carries a plurality of cams which control many of the functions of the machine, and particularly a print control cam 220, as will be described in more detail hereinafter (FIG. 3).

As shown in FIG. 1, the machine includes digit entry lCC keys 300 numbered from 1 to 9, inclusive, and a0 entry key 301. Function keys include an addition key 302, a subtraction key 303, a multiplier entry key 306, a multiplication key 307, a dividend entry key 309 and a division key 310. Numbers are entered one order'at a time, lhighest order rst, by successive depression of the entry keys 300 and 301 for setting selector sectors 322 (FIG. 2). Depression of the addition key 302, for example, sets the machine into operation, connects the actuator sectors 450 to the selector sectors 332 by means of a front gear pendant 475, connects the actuator to the primary accumulator 505 by means of a rear gear pendant 512., and drives the actuator sectors for transferring the number from the selector to the primary accumulator 505. Depression of the subtraction key 303 similarly enters a number from the selector 3-32 subtractively into the accumulator 505 through the subtract rear gear .pendant 526. The accumulator 505 is shiftable to the right and left order-by-order for purposes of multiplication and division, and for decimal point control in connection therewith. A number in lche .accumulator may serve as the dividend in a division operation, or alternatively, ya dividend may be transferred from the selector to the accumulator by a depression of the EN- TER DIVD key 309.

Depression of the multiplier entry key 306 causes a number to Ibe `transferred from the selector to the storage unit 510, carried atop the movable primary accumulator 505. With a number in the selector to serve as the multiplicand, the multiplication key 307 may be depressed to cause a multi-cycle multiplication operation in which the multiplicand in the selector is repeatedly entered into the primary .accumulator 505 under control of the digits of the multiplier in a storage unit 510.

With a dividend in the primary accumulator 505 and a divisor in the selector, the division key 310 may be depressed to cause an automatic multi-cycle division operation during which the divisor is first aligned with the dividend, is then repeatedly subtracted from the dividend, tand the quotient is counted intothe storage unit 510.

Printing mechanism The calculator of the present invention also includes the well-known Iordinally arranged print wheels 1088 (FIG. 2) which are rotated an amount proportional to the movement of the coordinal actuator sectors 450 during the downstroke. thereof. As is well-known in this type of construction, the print wheels 1088 are rotatably supported on print wheel carriers 1085 which are springurged to rock for striking the print wheels lagainst the platen 1090. The carriers are normally held in their retracted position by the transverse rod 1094, which rod is supported at its ends by similar bail legs 1095 (one -of which is shown in FIG. 3). These bail legs are urged to rock about their supporting shaft by springs 1096 connected at their ends. An arm 1098 (PIG. 3) is rockably mounted on shaft 487 and carries `at its other end a cam following roller 1099 which is disposed above, and rearward of, the main drive, or cam, shaft and rides on the periphery of the print control cam 220. An arm 1.100, also mounted on the shaft 487, is fixed at its forward end to the upper end of the arm 1098 and has the upper edge of its rear end disposed beneath a pin 1101 carried by the bail leg 1095.

The cam 220 has a deep low portion 1102 of limited angular extent, which low portion comes into registry with the cam following roller 1099, approximately after the beginning of the machine operating cycle and just after the actuating sector rod 453 (FIG. 2) reaches the end of its down stroke. The roller 1099 is in the low portion 1102 during the middle portion of the cycle. While the rod 453 dwells at the bottom of its stroke yand just before the rod starts' its up stroke, the roller 1099 rides out of the low portion 1102 and restores the print wheel carriers to their normal, or full-cycle, position.

The foregoing mechanism is more fully shown and described in the above-mentioned patent, No. 3,181,786.

Keyboard clearing operation The keyboard or selection mechanism clearing key 308 (FIGS. 1, 3 and 4) has an elongate, flat stem 1335 mounted for vertical movement on the left-hand frame plate 109 (FIG. 1) by suitable means, such as vertically spaced studs 1336 and 13-37 extending through corresponding, longitudinal slots in the key stem. Intermediate its length, this stem carries the pin 182 which engages the cam edge 179 o-f the actuating slide 175 to move the actuating slides 175 and a similar actuating, or control slide (not shown) forward to cycle the machine when the key is depressed and which pin also engages an extension of the interlocking bar =196 to interlock the remaining control keys when the CLEAR KEY- BOARD key is depressed. Depression of the CLEAR KEYBOARD key 308 will thus cause the machine to cycle and cause the actuator sectoroperating bail to move, first down, during the first half of the operating cycle, and then u during the latter half of the same cycle.

A three-armed print blocking lever 1338 (FIG. 3) is rockably mounted at the juncture of its arms on t-he left-hand end of a fixed stub shaft 1339 supported by `a suitable bracket, not illustrated, from the machine base. One arm 1340 of the lever 1338 extends forward and has the upper edge of its forward end portion disposed lbelow a pin 1341 projecting to the right from the lower end of the key stem 1335 so that the lever 1338 will be rocked in a clockwise direction, as viewed in FIG. 3, when `the key 308 is depressed.

A spring 1342, connected between the lever arm 1340 and one arm 1343 of a bail 1762 (to be described more fully hereinafter) rockably mounted on the shaft 164, resists the rocking -of the lever 1338 by depression of the key 308 and resiliently urges the lever 1338 to rock in a counter-clockwise direction, as viewed in FIG. 3. The lever 1338 has the second arm 1345 extending up and rearward from the shaft 1339. This lever arm is provided at its upper end with an olfset shoulder 1346 which is moved under thecam following roller 1099 on the print control arm 1098 when the lever 1338 is rocked in a clockwise direction, as viewed in FIG. 3, by depression of the CLEAR KEYBOARD key 308. When the shoulder 1346 is disposed un-der the cam following roller 1099 as the low portion 1102 of the print cam 220 comes into register with the roller 1099, the shoulder 1346 will prevent the roller from dropping into the cam low portion and thus the printing operation of the *machine will be suppressed. It may be noted that the lever arm 1345 carries, near the shoulder .1346, an adjustable stop 1347 and that the print control arm 1098 has a rearward projecting tail portion 1348 which engages the stop 1347 when the lever 1338 is in its norma-l position and the roller 1099 rides into the cam low portion 1102 during 4a printing operation. This provides an adjustable cushioned stop for the print wheel actuating movement of the arm 1098. While the shoulder 1348 and the stop 1347 are illustrated, these elements could be omitted, if desired, without loss of the print suppressing function of the lever arm 1345.

Automatic multiplication The liat stem 1415 of the multiplication key 307 (FIG. 3) is guided for vertical movement on the vertically spaced studs 1750 and 175|1 extending through corresponding, longitudinal slots in the key stem. The key is resiliently urged to its raised position by a suitable tension spring 1364. A latch lever 1654 depends 4 from a fixed stud 1753 and is formed near its lower end with a down facing shoulder. When the key 307 is depressed, a pin 1755, carried by the key stem, engages under the downward facing shoulder of latch 1654 so that the key is held depressed untilit is automatically released at the end of the multiplication operation.

At the end of the multiplication operation, a link 1653 pivotally connected to latch 1654 is pulled rearward for releasing the latch lever at the end of the multiplication operation. A blocking lever 1756 is also mounted on the stud 1753, and has a shoulder engageable under the pin 1755 to preclude depression of the key 307 if the latch lever 1654 is moved to its keyreleasing position before the key 307 is depressed. The multiplication key 307 thus cannot be depressed unless the latch lever 1654 is free to latch it in depressed position. Associated with the multiplication key 307 is suitable mechanism, more fully shown and described in Patent No. 3,181,786, for operating the main clutch and closing the motor circuit to establish cyclic operation of the machine when the multiplication key is depressed.

Referring to FIG. 3, the bail lever 1762 rocks on the shaft .164 and has the rear arm 1343, a down extending arm 1783 and a pair of similar substantially parallel, forward extending arms, of which the left arm 1761 is shown in FIG. 3. The right forward arm (not shown) of this bail 1762 underlies .the latch pin 1755 on stem L 1415 of the multiplication key 307. Pin 1755 is aligned with a pin 2034 (FIG. 4) on stern 2030 of division key 310, which pin 2034 overlies the left forward extending arm 1761'(FIG. 3) of bail 1762.

An interponent lever 1768 (FIG. 3) is rockably mounted, intermediate its length, on the pin 1368 at the upper end of the third, or intermediate, arm 1369 of the print blocking lever 1338. This lever is resiliently urged to rock in a clockwise direction, as viewed in FIG. 3, by a spring 1769, connected between one end of the interponent lever 1768 and the arm 1345 of the print blocking lever 1338. The rearward projecting arm 1343 of the 'bail 17612 carries, at its rear end, a roller stud 1770 bearing on an up facing cam edge of the interponent lever l1768 disposed rearward of the pin 1368. l'Ihe spring 1342 normally urges the bail 1762 to rock in a. counter-clockwise direction, as viewed in FIG. 48, and this maintains the interponent lever 1768 rocked in a counter-clockwise direction against the force of spring 1769, the spring 1342 being stronger than the spring 1769. When the multiplication key 307 is depressed and the bail 1762 is rocked in a clockwise direction, as viewed in FIG. 3, the spring 1768 rocks the interponent lever 1768 in the clockwise direction and positions the rear end of this interponent lever in the path of a stud 1771 carried by the print cam 220.

Near the middle of the first operating cycle after the multiplication key has been depressed, the multiplicand which is in the selector, is printed. Thereafter, near the end of that cycle, the stud 1771 engages the rear end of the interponent lever 1768 and rocks` the print blocking lever 1338 to its print blocking position. A latch hook 1772 is rockably mounted at its lower end on a pivot stud 1773 carried by a frame bracket 1774 at the front end of the machine, and has at its upper end a hook formation engageable with a stud 1775 carried by a rearward extension of the arm 1340 of the print suppressing lever 1338. The latch hook is urged to stud-latching position by a tension spring 1776 and is normally held in inoperative position by a bail 1777 rockably `.mounted on a pin 1760 carried by the bracket 1774. The bail 1777 has a forward projecting arm 1778 which carries a stud 1779 overlying a Iforward projecting toe formation 1780 of the latch lever 1772. When the bail 1777 isheld in its normal position, that is, rocked in 4a clockwise direction, as viewed in FIG. 3, the stud 1779 bears onthe upper edge of the toe formation 1780 and holdsA the latch hook 1772 out of position to engage the stud 1775. The

4cation cycle, it is set again bail F1777 has an arm 1781 projecting up from the bail pivot 1760 and connected at its upper end by a link 1782 with the lower end of the depending arm 1783y of the bail 1762. With this arrangement, as long as the bail 1762 is maintained rocked in its normal counter-clockwise direction by the spring 1342, the latch hook 1772 is maintained in inoperative position. However, when the bail `1762 is rocked in the clockwise direction by depression of the multiply key 307, the bail 1777 is rocked in the counter-clockwise direction, as viewed in FIG. 3, and the latch 1772 is released for movement by its spring 1776 to engage the stud 1775 and latch the print blocking lever 1338 in its print blocking position when the lever is moved to this position by the ,action of the stud 1771 on the interponent lever 1768, as described above. The printing operation ofthe machine will thus be blocked after the first machine cycle of lthe multiplication operation, and will be restored when the multiplication key 307 is released at the end of the multiplication operation.

Clearing keyboard after multiplication The release of the multiplication key 307 does not immediately stop the machine since it is necessary for `manner described in the above-mentioned Patent No.

3,181,786. This action causes the machine to execute a clear keyboard cycle as previously described.

Although the print blocking lever 1338 is released by the multiplication key 307 at the end of the last multipliby the depression of the clear keyboard key so that printing is blocked during the final clear keyboard cycle.

Total after multiplication l After the multiplication operation has been completed, the product may be printed by depressing the total key of the machine. As is described in Patent No. 3,181,786, the machine of the present invention includes mechanism for calculating the position of the decimal point in products and quotients, for printing it in the correct position, and for discarding, that is, omitting unwanted orders from printed products. Such discarding is accomplished by setting only the wanted orders in alignment with the actuator during the print-out of the product. The correct position of t-he decimal point in the printed product is controlled by the ordinal position of a pin 1974 on a bail 1727 (FIG. 2) which is moved from an extreme left home position to the required position in response to the manual assignment of the decimal points in the multiplier and multiplicand as they are entered. This position is calculated to leave unwanted orders unaligned with the actuator. Since, at the end of the multiplication operation, the primary accumulator was left in t-he righthand position to which it had been stepped during the multiplication operation, in order to have the product printed in the proper ordinal position on the printing tape, it is necessary to return the primary accumulator to the left to align the numerical orders with the .position selected for the printed decimal point. Accordingly, when the TOTAL key 318 is depressed, the machine rst shifts the accumulator 505 to the left to the correct position for printing the total. In general, one or more orders at the right of the accumulator will be discarded simply because they will not be aligned with any sectors of the actuator. In order to clear these orders, the printing of the total is followed automatically by a shift of the accumulator to its extreme -left position and another total operation with printing suppressed. W-hen the total key 318 (FIG. l) is depressed, it establishes power operation of the machine, it rotates bail 827 about shaft 155 (FIG. 2), and the key is latched down by a keeper (not shown). Bail 827, in turn, rotates bail 1948 (FIG. 3) about shaft 6 1408, and an ear 1948`a on bail 1948 abuts andmoves an ear 1944 on bail `1777 which, `as may be seen in FIG. 3, through link 1782, rotates bail |1762 clockwise for lifting roller 1770 for letting the spring 1769 set interponent 1768 to its clockwise, or active, position. Bail 1777 also lifts roller 1779 for enabling latch 1772.

As is explained in the above-mentioned Patent No. 3,181,786, the depression of the TOTAL key 318 operates mechanism associated with bail 1948 for setting up a left shift control operation of the primary accumulator 505. The primary accumulator shifts left until a detent (not shown) on the left side of the accumulator carriage 505 engages pin -1974 (FIG. 2). Thereupon, shifting stops and the main drive shaft operates through one cycle for printing out the total. Near the end of this TOTAL cycle, roller 1771 (FIG. 3) drives against interponent 1768 for rotating the print-block lever 1338 (clockwise in FIG. 3) to blocking position, where it is held by latch 1772. T'he accumulator 505 then moves to its extreme left, or home, position, and then the main drive shaft 135 is rotated through a second TOTAL operation. During this second TOTAL-operation, lever 1338 (FIG. 3) is latched in print-blocking position and so prevents printing. Accordingly, this last TOTAL cycle merely clears t-he discarded orders out of the accumulator. Near the end of this last TOTAL cycle, the keeper (not shown) is rotated to release `key 318 and at the end of that cycle the operation ends.

Division The mechanism for entering the dividend into the primary accumulator 505 of the present machine has been completely described in the patent, No. 3,181,786', previously referred to. Because the dividend entry mechanisms of the application, it is believed to be unnecessary to provide a lengthy description herein. However, it should be mentioned that subsequent to the dividend being additively entered into the primary accumulator of the machine, the divisor is entered into the keyboard by sequentially -depressing the digit keys in the usual manner. The division key 310V is then depressed to establish automatic division operation of the machine. The operation thus initiated includes rst, a division-aligning sub-program, and second, the division itself which follows the divisiorhaligning sub-program automatically, `and which may conveniently be called the division sub-program.

The division key 310y has a flat stern 2030 (FIG. 4) supported for vertical movement on vertically spaced fixed pins 2031 and 2032 extending through corresponding, longitudinal slots in the key stern. This key is resiliently raised by a spring 2033 connected between the upper fixed pin '2031 and a pin 2034 on the stem and is re- -leasably latched in depressed position by a latch dog 2035. this latch dog is rockably mounted at its upper end on the stud 1753 which supports the latch lever 1654 for the multiplication (z) key 307 (FIG. 3) and is provided at its lower end with a transverse shoulder 2036 which engages over the pin 2034 when the key is depressed to latch the key in depressed position. The key is automatically released at the end of the division operation by mechanism not here pertinent but which is fully shown :and described in U.S. Patent No. 3,181,786.

Depression of the division key moves the roller stud 180, carried by the key stem 2030, down along the upward and forward inclined cam edge 177 of the clutch and motor control slide 175, moving this slide forward to establish operating cycles of the machine. Pin 2034 also overlies the left forward arm 176-1 of bail lever 1762 (FIG. 3), previously described in connection with the multiplication key 307, so that depression of the division key rocks bail 1762 to set interponent lever 1768 (FIG. 3) and latch 1772. Accordingly during the first machine cycle, pin 1771 on cam 220 engages interponent 1768 to set the print-blocking lever 1338, and latch 1772 holds it, so that printing is blocked in all machine cycles of the automatic division operation except the iirst one, just as it was lblocked in the multiplication operation.

The depression of arm 1761 (FIG. 3) of bail lever 1762 by the divisi-on key 310 will also depress a pin 1763 for setting the repeat mechanism, as described in the above-mentioned Patent No. 3,181,786.

Thus, when the division key is depressed, the machine begins the division-aligning operation. In the iirst cycle, it prints the divisor, and then roller pin 1771 (FIG. 3) drives against interponent 1768 for setting the print-block lever 1338, which is then held in blocking position by latch 1772, as in the multiplication operation. The machine continues operating, goes through the divisor aligning sub-program and the 4division sub-program, during all of which printing is blocked by lever 1338. In the cycle in which division is completed, a link 2262 (FIG, 4) moves rearward for pulling latch dog 2035- rearward land -releasing the division key 310. The raising of .the division key, through bail 1762, llink 1781 and lever 1777, clears latch 1772 (clockwise in FIG. l3) to release print-block lever 1338. The raising of division key 310 also initiates a clear keyboard operation, as described in the above-mentioned Patent No. 3,181,786, for clearing the divisor from the selector, during which operation printing is blocked as in any other clear keyboard operation.

Thus, in the multi-cycle operation of MULTIPLICA- TION and DIVISION, of printing the PRODUCT and in clearing out unwanted decimal places, the print-blocking lever 1338 is set to blocking position after printing in the irst cycle of main shaft 135 and then held there until the end of the operation.

It will be appreciated that the invention is capable of numerous embodiments and variations within the scope of the appended claims.

What is claimed is:

1. In a calculator, drive means for operating said calculator in cycles, a printing register movable for printing, means for transferring values thereto for printing, impression means operable for moving said register relative to a support in timed relation to each machine cycle for making a printing impression, normally-inactive print-stop means for making said impression means inactive, means operable by said drive means at a time in the machine cycle subsequent to a printing movement of said register for making said print stop means active, initiating means for initiating a plural-cycle operation of the calculator for causing said register to print during the first cycle and for moving said print-stop means to an active position, holding means made etfective by operation of said initiating means for holding said print-stop means in said active position and thereby keeping said impression means inactive during succeeding machine cycles of said plural-cycle operation, and means operable on said holding means at the end of said plural-cycle operation for releasing said print-stop means, whereby during said plural-cycle operation, said register prints only in the lirst cycle thereof, and at the end of said pluralcycle operation is reconditioned for printing.

2. In a calculator, a printing register movable for printing, means for transferring values thereto for printing, spring means for driving said register in a printing stroke, lirst cam means for normally holding the register against movement by said spring means and for also releasing it for printing and resetting it during a single machine cycle, a blocking lever for blocking said springdriven printing stroke of said register, means biasing said blocking lever out of blocking position, a latch for holding said lever in blocking position, second cam means and a movable interponent for moving said lever into blocking position, said movement of said blocking lever by said second cam means occurring later in the cycle than the release of said printing register by said irst cam means for printing, said interponent being normally out of intervening position, initiating means for initiating a plural-cycle operation of the calculator for causing said register to print during the first cycle thereof, and for moving said interponent to active position, whereby said 'blocking lever is moved to blocking position and latched after the printing stroke in the rst cycle for thereby blocking printing during later cycles, and means for releasing said latch at the end of said plural cycle operation.

References Cited by the Examiner UNITED STATES PATENTS 1,355,258 10/1920 Pentecost et al 235 6018 1,742,530 1/ 1930 Gubelmann 23S-60.25 2,682,994 7/ 1954 Boyden et al. 23S-60.25 2,833,466 5/1958 Boyden et al 235--63l 2,918,212 12/ 1959 Llorens 235 6028 2,970,754 2/ 1961 Gang 235 63 2,984,411 5/ 1961 Tingley 23S-60.25 X 3,064,883 11/ 1962 Norris 23S-60.25

RICHARD B. WILKINSON, Primary Examiner. S. I. TOMSKY, Assistant Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent NO 3 ,285 511 November l5, 1966 Teresio Canevari, deceased, by Anita Gianotti, Eole heiress and legal representative It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 1, line 38, for "devisor" read divisor column 2, line 8, for "322" read 332 n; column 4, line 50, for "1768" read 1769 column 6, line 35, for "anisms" read anism is only indirectly concerned with the novel mechanisms line 54, for "this" read This Signed and sealed this Sth day of September 1967.

(SEAL) Attest:

ERNEST W. SW'IDER EDWARD I. BRENNER Attcsting Officer Commissioner of Patents 

1. IN A CALCULATOR, DRIVE MEANS FOR OPERATING SAID CALCULATOR IN CYCLES, PRINTING REGISTER MOVABLE FOR PRINTING, MEANS FOR TRANSFERRING VALUES THERETO FOR PRINTING, IMPRESSION MEANS OPERABLE FOR MOVING SAID REGISTER RELATIVE TO A SUPPORT IN TIMED RELATION TO EACH MACHINE CYCLE FOR MAKING A PRINTING IMPRESSION, NORMALLY-INACTIVE PRINT-STOP MEANS FOR MAKING SAID IMPRESSION MEANS INACTIVE, MEANS OPERABLE BY SAID DRIVE MEANS AT A TIME IN THE MACHINE CYCLE SUBSEQUENT TO A PRINTING MOVEMENT OF SAID REGISTER FOR MAKING SAID PRINT STOP MEANS ACTIVE, INITIATING MEANS FOR INITIATING A PLURAL-CYCLE OPERATION OF THE CALCULATOR FOR CAUSING SAID REGISTER TO PRINT DURING THE FIRST CYCLE AND FOR MOVING SAID PRINT-STOP MEANS TO AN ACTIVE POSITION, HOLDING MEANS MADE EFFECTIVE BY OPERATION OF SAID INITIATING MEANS FOR HOLDING SAID PRINT-STOP MEANS IN SAID ACTIVE POSITION AND THEREBY KEEPING SAID IMPRESSION MEANS INACTIVE DURING SUCCEEDING MACHINE CYCLES OF SAID PLURAL-CYCLE OPERATION, AND MEANS OPERABLE ON SAID HOLDING MEANS AT THE END OF SAID PLURAL-CYCLE OPERATION FOR RELEASING SAID PRINT-STOP MEANS, WHEREBY DURING SAID PLURAL-CYCLE OPERATION, SAID REGISTER PRINTS ONLY IN THE FIRST CYCLE THEREOF, AND AT THE END OF SAID PLURALCYCLE OPERATION IS RECONDITIONED FOR PRINTING. 